Presence of ______________ in a dry gaseous fuel does not contribute to its calorific value?
Correct answer: B. Oxygen
- A. Sulphur
- B. Oxygen
- C. Hydrogen
- D. Carbon
Explanation
Oxygen is already in an oxidised state and releases no useful heat by further combustion, so it contributes nothing to the fuel's calorific value. Carbon, hydrogen and combustible sulphur can all contribute heat.
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